Telephone-receiver.



No. 881,712. PATENTED MAR. 10, 1908.

- H. G. PAPE.

- TELEPHONE RECEIVER. AP1 LIOATIOH FILED {11151316, 1904. RENEWED JAN. 26, 1908 1. M I I I I I 1 I w Wain/$0 e a i for c eaning and repair when necessary, and

HERMANN e. PAPE, OF NEW YORK,- N. Y.

TELEPHONE-RECEIVER.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed June 16, 1904, Serial No. 212,820. Renewed January 25, 1908. Serial No. 412,638.

To all whom it may concern:

Be it known that I, HERMANN G. PAPE, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Telephone-Receiver, of which the following is a specification.

This invention. relates to a telephone receiver of that general type which is particularly adapted for use as the ear-piece of an audiphone set, an electrical apparatus ineluding instruments correspondlng to the transmitter and receiver of a telephone system and battery connections, all arranged in a manner to facilitate the transmission of speech to persons having defective hearing.

The object of the invention is to produce a simple and inexpensive ear-piece or receiver, the arts of which will be easily accessible embodying in its organization a casing and removable front and rear caps, one serving to retain the diaphragm, and the other the mounting of an armature connected to the diaphragm by a connecting rod passed through a novel form'of magnet opposed to the armature to actuate the same.

To the accomplishment of the recited objects and others subordinate thereto, all of which will hereinafter more fully appear, the

= invention resides in that construction and arrangement of parts to be described, illustrate in the accompanying drawings and defined in the claims.

In said drawingsFigure 1 is a sectional view of my receiver. Fig. 2 is a front elevation with the cap and diaphragm removed. Fig. 3 is a rear elevation with the rear cap removed. Fig. 4 is a sectional view of the magnet omitting the coil, and Fig. 5 is a detail perspective view of the armature and its spring spider. t

Like numerals indicate corresponding parts throughout the views. v

1 indicates a cup-shaped casing of any suitable material, closed at its front side by the front cap 2 screwed thereon and equipped with the usual axial opening 3 and external concavity 4. Opposite the concave inner face 5 of the cap 2is disposed a diaphragm 6 retained at its periphery between a pair of annular gaskets 7 and 8, for the reception of which the contiguous faces of the oasing'and cap are formed with annular seats, as shown. From the back of the casing 1 extends an annular flange 9, into which is screwed what may be termed the rear ca 10, preferably of concavo-convex form. T e back wall 11 of the casing proper divides the instrument into front and rear compartments, and is formed with an axial internally threaded opening 12 into which is screwed the externally threaded shell 13 of the cylindrical magnet 151, comprising the shell 13 a hollow axial core 15 an integral head 16 connecting the core and shell at the front end of the magnet, and a coil 17 wound upon the core. This magnet is retained in place by its threaded connection with the wall 11, and by a lock nut 18 screwed upon the shell and bearing against a I soft rubber gasket 19 interposed between the nut and the front face of the wall 11.

I The magnet 14 is designed, when a circuit is closed through the coil, to vibrate the diaphragm, not by the immediate attraction thereof, but by operating an armature 20 located in the rear corn artment of the instrument, and connecte to the diaphragm through the medium of a connecting rod 21 passed through the hollow core 15 of the magnet, and through axial openings in the armature and diaphragm respectively. The

connection of the rod 21 with the diaphragm is effected by means of a nut 22 screwed upon the front end of the rod, and readily accessible either through the axial opening 3 in the front cap or by simply unscrewing the cap from the casing. The rear end of the rod 21 is screwed through the armature 20, which is a small disk of metal, as shown in Fig. 5, and is also passed through a spring metal spider 23 constituting an armature spring riveted or otherwise secured to the armature.

The radial legs 24 of the spider 23 are deflected, as shown in Fig. 1, and are retained at their outer ends between a pair of annular soft rubber gaskets 25 and 26 held in place by the'cap'lO, which latter, and the back wall 11 of the casing, are formed with seats for their reception, as shown. To prevent compression in either compartment of the instru- -ment casing due to the vibration of the diaphragm or armature as the case may be,

the annular wall of the front com artment is formed with o enings 27 and t e cap is pierced by aplura 1ty of openings 28. Thereceiver or ear-piece thus constructed ispreferably equi ped with the usual head-piece 29, and is wire in any approved manner.

, It will be seen that the detachable ,front and rear caps of the casing serve respectively to retain t e diaphragm and the armature mounting in place, and that by merely unscrewing these caps all the interior parts are rendered easily accessible for the purpose of cleaning, repairing or replacing the same. Furthermore, by adjusting these ca s, the gaskets retaining the outer edges of t e diaphragm and armature spring respectively, are more or less compressed to effect the more or less rigid retention of the spring and armature and to regulate the tension thereof within certain limits. Attention is also directed to the fact that b the adjustment of the nut 22, the distance fietween the magnet and its armature may be varied.

It will of course be understood that the undulations of the current induced in-the circuit through the magnet by the sounds uttered in proximity to the transmitter.

(which is the audiphone receiver) will vary the attractive power of the magnet and cause the movement of the armature 20 which, by reason of the intermediate connection, will vibrate the diaphragm to reproduce the sounds. Of course the magnet ma be polarized if desired.

t is thought that from the foregoing the construction of my telephone receiver and audiphone ear-piece will be comprehended; but while the present embodiment of the invention appears at this time to be preferable,

I wish to be understood as reserving the right to effect such changes, modifications and variations of the illustrated structure as may come fairly within the scope of the protection prayed.

What I claim is 1. In a receiver, the combination with a casing having front and rear caps, an armature, a diaphragm and a magnet housed within the casing, an armature spring supporting the armature and having a plurality of ends retained by the rear cap of the casing,

said armature having connection with the dia phragm, and said armature spring being adjustable by the rear cap.

2. In a receiver, the combination with a casing divided to form front and rear compartments, of an armature in one compartment, a diaphragm in the other compartment, a magnet having an inclosing shell screwed into the dividing wall of the casing, and a connection passed through the magnet between the armature and the diaphragm.

3. In a receiver, the combination with a casing divided to form front and rear cempartments closed by detachable front and rear caps, of a diaphragm and an armature located in the respective compartments and retained in place by the caps, an intermediate magnet mounted'in the dividing wall of the casing, and a connection between the armature and the diaphragm, said connection serving as a means for regulating and adjusting the tension of the diaphragm and armature spring.

4. In a receiver, the combination with a casing, of a diaphragm, an armature, an intermediate magnet, a connection between the armature and the diaphragm, an armature spring, and detachable caps for the casing,

one of said caps serving as retaining means for the diaphragm, and the other cap serving to retain the armature spring and also as a means for regulating the distance between the armature and the pole pieces of the magnet.

5. In a receiver, the combination with a casing, of a magnet therein, a diaphragm, a pair of rubber gaskets between which the periphery of the diaphragm is interposed, a detachable front cap retaining the gaskets in place, an armature opposed to one end of the magnet and connected with the diaphragm, an armature spring for urgin the armature in one direction, a pair of rub )er gaskets between which the ends of the armature spring are interposed, and a rear cap retaining the last named gaskets in place.

6. In a receiver, the combination with a casing divided to form front and rear compartments closed by detachable front and rear caps, of a diaphragm and an armature located in the res ective com artments, and a magnet adjusta ly mounte in the dividin r wall of the casing between the armature am the diaphragm.

7. In a receiver, the combination with a casing, of a diaphragm, armature, and magnet housed therein, said casing having a rear cap. which serves .to retain the armature in place, said cap serving also as a means for regulating the distance between the magnet and armature.

8. In a receiver, the combination with a casing having a dividing wall separating front and rear compartments of different diameters, front and rear caps having threaded connection with the casing, a diaphra 1n and an armature spring retained in place y the caps, an armature carried by the armature spring, an electro-magnet screwed into the dividing wall of the casing, and a rod connecting the armature and diaphragm and passed through the magnet.

9. In a receiver, the combination with a casing having a dividing wall and detachable front and rear caps, a diaphragm and an armature mounted in the casing at opposite sides of the dividing wall, a connection between the diaphragm and the armature, and an electro-magnet having a hollow core for the reception of said connection and also having a surrounding shell screwed into the dividing wall of the casing and adjustable toward and from the armature.

10. In a receiver, the combination with a casing having front-and rear ca s, an armature, a diaphragmand a magnet oused within the casing, and a spri spider supporting the armature and retaine by the rear cap of the casing.

11. In a receiver, the combination with a casing having a dividing wall and front and rear caps, an armature and a dia hragm mounted at opposite sides of the ividmg Wall, an electro-magnet having a surrounding shell screwed into the dividing wall, a

lock-nut carried by said shell, and a yielding gasket interposed between the lock-nut and the dividing wall of the casing.

12. In a receiver, the combination with a:

' casing divided to form front and rear compartments and having detachable front and rear caps; of an armature and a diaphragm retained in place by said caps, an electromagnet interposed between the armature and dia hragm and mounted in the dividing Wall of t e casing, the rear cap and that portion of the casing surrounding the front compartment being res ectively provided with a series of apertures o prevent compression in the front and rear compartments of the casi3. In a receiver, the combination with a casing having front and rear compartments, of an armature, a diaphragm and an iron-clad magnet housed within the casing, and a connection between the armature and the diaphragm, said connection servin' as a means or regulatin the tension of t e armature spring and a so for regulating the distance between the armature and the poles of the magnet.

' 14. In a receiver, the combination with a casing having front and rear caps, a diaphragm and a magnet housed within the easng, an armature, a spring spider supporting he armature, and means or var mg the istance between the magnet and t e armaure casing, of an iron-clad magnet, means for ad- 4 justing the magnet, a diaphragm, an armature, an armature spring, means for varyin the tension of the armature spring, an means for varying the tension of the diaphragm.

16. In a receiver, the combination with a casing, of an iron-clad magnet adjustably secured therein, a dia hragm and an armature mounted beyond t e o posite ends of the magnet and independent y adjustable, and a connection between the diaphragm and the armature. t

17. In a receiver, the combination With a casing, of a diaphragm secured at its outer edge to the casing, a bipolar magnet, an armature upon which the magnet exerts a bipolar actlon, supporting means ermitting the armature to maintain a su stantially parallel relation with the adjacent end of the magnet during the movement ofthe armature, and a connection between the armature and the diaphragm. x 18. In a receiver, the combination with a casing, of a magnet, a diaphragm and an armature, said magnet being concentric with the dialphragm and exerting a bi-(polar action er supportupon t e armature, a fiexiblespi ing the armature, and independent means for adjusting the armature, magnet and diaphragm. p

In testimony, that I claim the foregoing asmy own, I have hereto affixed my signature in'the presence of two witnesses.

HERMANN G. PAPE. Witnesses:

M; J. H. 1am, E. J Hieoms. 

